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The 7Hz x Crinacle ZERO:3 are wired in-ear monitors with a 10 mm dynamic driver, designed around a composite diaphragm with a metal dome. Combined with an N52 magnet and a CCAW voice coil, this driver aims to extend the bass response and improve responsiveness while limiting distortion.
Developed jointly by Crinacle and 7Hz according to the characteristics of the JM-1 curve, they seek a natural tonal balance and a structured soundstage. Their ergonomic shell and detachable cable with 0.78mm 2-pin connectors make them suited to everyday listening, with the option of replacing the cable with a compatible model.
The 7Hz x Crinacle ZERO:3 are based on a 10mm dynamic driver fitted with a composite diaphragm with a metal dome, designed to combine rigidity and low mass. The dome helps extend the frequency response, while the composite suspension supports its movement to better control the excursion of the membrane. This architecture aims to strengthen bass extension while limiting distortion, with the goal of preserving detail clarity when the signal becomes denser.


The driver relies on an N52 magnet and a CCAW voice coil, whose combination improves the efficiency of the electromagnetic motor. The membrane can thus react more quickly to signal variations, which favors the reproduction of transients and the precision of attacks. This design complements the work of the diaphragm: it aims to maintain a controlled response, both on bass impacts and on rapid dynamic changes.
The response of the Zero 3 was defined jointly by Crinacle and 7Hz, following the characteristics of the JM-1 curve. This choice aims for a natural tonal balance, without isolating the reproduction of bass, mids and treble from one another. The tuning also seeks to organize the soundstage, in order to distinguish the elements of the mix more clearly when listening to music or watching content.


The shell, newly molded around the contours of the ear, is designed to improve fit and distribute contact more comfortably during extended listening sessions. Its front part uses an eco-friendly medical-grade plastic, complemented structurally by the aluminum alloy back plate. This combination pairs contact suited to in-ear use with a construction designed for daily wear.
The ZERO:3 come with a high-purity oxygen-free copper cable, connected to the earphones via 0.78mm 2-pin connectors. This detachable interface makes it easy to replace the cable in case of wear or to swap it for a compatible model, while the conductor provides the electrical connection to the driver. This allows you to keep the earphones while changing their connection according to the needs of your setup.

Technical specifications
| Specifications | |
|---|---|
| Product type | In-ear monitors |
| Frequency response | 10Hz-20kHz |
| Impedance | 30Ω |
| Sensitivity | 105dB |
| Total harmonic distortion (THD) | 0.5% |
| Drivers | 1x Dynamic Ø10mm |
| Cable termination | 3.5mm Jack |
| Earphone connectors | CIEM 0.78mm 2 pins |
| Cable conductor material | OFC copper |
| Microphone | |
| General | |
|---|---|
| Weight | 3.6g / earphone |
| Color | Silver |
| Package | 1x 7Hz x Crinacle ZERO:3 1x 3.5mm Jack to CIEM cable with mic 6x Pairs of ear tips |
| Color | Silver |
| Impedance (Ω) | 30 |
| Efficiency / Sensitivity (dB) | 105.0 |
| Wireless | No |
| Cable termination | Jack 3.5mm |
| Headphone / Earphone connector | CIEM |
| Phone call feature | Yes |
| Noise reduction | No |